Not sure if this is the correct forum, but I'm looking for how to identify my motors. They have no labels on them. I bought my V2 about in Oct 2015. I got the ballcup arms in the kit, but also an ATX powersupply.

I've also got some other unmarked motors. Are there serial numbers hidden somewhere, possibly inside? I don't mind opening them up, but I don't want to unless I have to.

They are likely from Automation technology. In most cases, somewhere on the outer casing there will be a model number. However, if I am recalling correctly, they have stickers rather than engraved serial numbers or model numbers. I believe they are KL17H247-168-4A motors. As for other unmarked motor's, your best bet is to try to characterize them rather than trying to find internal model numbers, as to a large extent, the numbers are intended to make inventory control or replacement easier, and having to open a motor doesn't serve either purpose. You can always try though.